Stop-motion for machines for winding yarns, threads, and the like.



H. M. A. C. WILDT.

STOP MOTION FOR MACHINES FOR WINDING YARNS, THREADS, AND THE LIKE.

APPLICATION man SEPT- 12. l9l4- 1 373,562. Patented July 23, 1918.

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HIM. A. c. WILDT.

STOP MOTION FOR MACHINES FOR WINDING YARNS, THREADS, AND THE LIKE.

APPUCATION FILED SEPT-12,1914.

1 ,273,56& Patented July 23, 1918,

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H. M. A. c. WILDT.

STOP MOTION FOR MACHINES FOR WINDING YARNS, THREADS, AND THE LIKE.

I APPLICATION FILED SEPT- I2, 1914.

1 ,27 3,562. Patented July 23, 1918.

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HANS MARIA AUQUS'I CARL WILDT, 0F LEICESTER, ENGLAND, ASSIGNOB T0 WILDT 86 00., LIMITED, OF LEICESTER, ENGLAND.

STOP-MOTION FOR MACHINES FOR WINDING YARNS, THREADS, AND THE LIKE.

Application. filed September 12, 1914.

To all whom it may concern.

Be it known that I, Hans MARIA AUGUST lam. l/VILDT, a subject of the King of Great Britain, citizen of Leicester, England, resid ing at Leicester, in the county of Leicester, England, have invented new and useful Improvements in or Relating to Stop-Motions for Machines for WVinding Yarns, Threads, and the like, of which the following is a specification.

This invention relates to stop motions for machines for winding yarns, threads and the like. The object of the invention is to construct an improved stop motion for winding machines of the kind wherein the winding spindle is driven by a friction wheel which cooperates with a disk on said spindle, such improved stop motion being especially suitable for dealing with artificial silk or tender yarns, although it is not by any means exclusively so as it may be equally well employed with the winding of other threads and yarns.

The invention will be hereinafter described with reference to the accompanying drawing wherein a convenient construction of the improved stop motion is shown applied to a winding machine of the kind before referred to and wherein the thread or yarn is being wound from a hank to a bobbin.

In the drawing referred to Figure 1 is a side view, and

Fig. 2 is a front view of the mechanism.

Fig. 3 is a side view, and

Fig. 4 is a plan of a modification wherein the lever is counterweighted instead of spring-controlled, and Fig. 5 is an elevation of a further modification hereinafter referred to.

Fig. 6 shows in plan an alternative construction of the end of the lifting lever.

Like parts are designated by the same reference characters in. both figures of the drawing.

a, a, a are the longitudinal frame bars of the winding machine. I) is the wheel shaft,

c the friction driving wheel, (Z the driven disk, 0 the winding spindle, f the bobbin, and g the traversing thread guide. The thread it is drawn from the hank i on a rotary carrier or frame 7' and passes through the usual guide or tension device is. All the foregoing features may be of well known Specification of Letters Patent.

Patented July 23, 1918.

Serial No. 861,331.

form and arrangement and do not need further description herein.

In the concrete form of stop motion illustrated, in Figs. 1 and 2 a lever 1 is fulcrumed at 2 to a lug 3 on the lower bearing m. of the spindle e. The end 3 of the said lever is situated underneath the disk (Z and is provided with an adjustable pad 4 or screw adapted to bear against the underside of the disk. The end of the lever may as shown in Fig. 6 be forked to extend on each side of the spindle 0 so that two lifting pads or screws may be used tolift the disk, these acting on opposite sides of the spindle.

A. spring 5 suitably anchored at one end and connected at the other to the lever 1 serves to normally hold the extended end of said lever raised but permits this end of the lever to be depressed, when necessary, as will be described later. By means of notches 7 in the under edge of the lever the points of connection of the spring 5 with the lever may be varied in relation to the fulcrum 2 for the purpose of regulating the lifting influence of the spring upon the lever.

Adjustably attached to the end 6 of the lever l by a collar 8 and screw 9 (or by any other suitable means) is a rod 10 having a roller 11 at its upper end. The thread 71- passes over this roller, and the lever 1 is so arranged that under normal working conditions, the roller 11 will be raised higher than the point 12 so as to carry the thread up as shown in Fig. 1 whereby any abnormal tension on the thread will influence the roller and cause a depression of the end 6 of the lever 1. \Vhen the lever is thus actuated, the end 3 thereof raises the disk (Z from the wheel 0 and so varies or steps the transmission of the drive between said wheel and the disk.

Instead of employing a spring such as 5 to yieldingly hold up the lever 1, the latter may be counter-weighted for the same purpose. An arrangement of this form is shown in Fig. 3 where the lever 1 is normally held raised by a counterweight 17 attached tothe lever by a pin 18. Washers 19 on the pin 18 may be varied in number to alter the effective weight on the lever. The lever 1 may as shown in Fig. 4, be pivotally mounted upon balls 20 to reduce friction.

The degree to which the lever 1 will be actuated by the thread will, of cOuISQ, d6

the thread will, while it may not be great enough to actuate thelever to such an eX-. tent as to completely stop the bobbin, nevertheless pulldown the end 6 sufficiently to affect the driving contact of the disk cl with the driving wheel 0 so that the speed of rotation of the bobbin will be automatically regulated in accordance with'theincreased tension on the thread. At the same time the upwa'rd'pressure of the roller 11 is (by the aforesaid depression of the end of the lever and the consequent influ nce of the spring 5 of counterweight '17 upon the lever) felt by the thread, with the result that in cases of slight raveling or other obstructionof atemporary nature the action of the lever upon the thread is found to be effective toward the thread clearing itself of the ravel' or obstruction, and when this happens'theleverl (under the action of the spring 5' or counterweight 17) rises and thereby restores to the normal the driving relation between the disk cl andwheel 0 so that winding once more proceeds under normal conditions. p

7 Now it will be seen that under temporary V abnormal conditions of the character just described where the thread in :due course clears itself of the obstruction, 'and where the increased tension on the thread caused by such obstruction does not actuate the le-' ver to any great extent, the increase of tension on the thread is but a passing one and therefore is not likely to have any detrimental elfect upon tender and delicate yarns, especially as in most cases the tempo rary abnormal condition does not stop the rotation of the bobbin entirely.

When however, the abnormal-conditions are due to obstruction, raveling or other causes of more serious character and such I 7 that do not admit of being readily overcome in the automatic manner previously referred to the tension on the thread is increased to a degree which causes movement of the lever 1 to such an extent that, by the complete separation of the disk d from the driving-wheel '0, rotation of the bobbin is completely stopped. When this occurs it will be understood that, owing to the incapability of'the thread to clear itself, Winding cannot proceed until the defect has i been remedied andin the meantime the bobbin must be prevented from rotation. Now while there may be some classes of yarns and threads which, without' detriment to their condition might maintain, by acontinued' pull upon the end 6 of the lever 1,

the disengagement of the disk (Z from the wheel 0, there are, on the contrary, other classes of threads, such for example as artificial silk and delicate and tender yarns, which when subjected to a continued abnormal tension for this purpose, might be liable to break or be otherwise'detrimentally affected.

In working up artificial silk on knitting machines, andindeed most other yarns but especially artificial silk, it is desirable that there should be as few knots or joins as possiblejtherefore with this end in view it it manifestly necessary to obviate to the greatest possibleextentlbreakage of the yarn or thread during the winding.

, In the stop motion hereinbefore described, the lever 1 and thread supporting roller 11 are arrangedto carry the thread that although say a tender yarn is capable of bearing increased tension sufficiently to pull the lever 1' down to stopping-position without breaking, such yarn might not be able to hold the lever in this position for long, particularly as there is nearly always a certain amount of vibration present in the machinewhich if it did not cause the tensioned yarn to break might cause it to stretch undesirably and; even to a degree to start the bobbin rotating again'which re-" sult would be almost certain to break the already weakened yarn.

For the purpose of avoiding the aforesaid continued strain upon the yarn or thread I provide in combin'ation' with the hereindescribed stop motion, means which i? operate automatically, when the lever is moved to the stoppingposition, to lock said lever againstreturn movement; Theielfect of this arrangement is that the thread or yarn having moved the lever to the stop- 1 ping position "at once relieved of the strain of holding itithere' seeing that the said means provided immediately engage the lever and retain it in the stopping position until the operator can attend to the cause ofthe stoppagef The" yarn or thread being re- .lieved of the function of holding up the le' ver is therefore not unduly strained' and the tendency to breakage is considerably 're- 'duced if not entirely eliminated.

one side thereof a shoulder 15, while on the opposite side of the fulcrum it is weighted at 16 which weight may constitute a handle for operating the catch to release the lover. The catch 13 is contiguous to the side of the lever 1 and upon the end 6 of the latter being depressed below the shoulder 15, the catch moves (actuated by its weight) toward the, lever, andbrings its shoulder into position over the lever and thereby prevents the latter rising. If the drag upon the thread is sufficiently strong to pull the end 6 of the lever down below the shoulder 15, the spindle is stopped and the lever becomes locked automatically by the catch, thereby relieving the thread of strain such as would be necessary to hold the lever down. The attendant may then clear the thread, and upon release by the catch (actuated by hand) the lever 1 will be raised to the normal position by the spring 5 or counterweight 17 thereby lowering the disk (Z into contact with the driving wheel 0 and starting the spindle a so that winding again proceeds.

If the drag or retardation is of a temporary character and not such as to pull the lever 1 low enough to enable the catch 13 to lock the same, the pulling down of the end 6 will nevertheless raise the disk (Z from the driving wheel 0 to reduce the speed of the bobbin as previously described or stop the rotation of the spindle a; At the same time the upward pressure of the roller 11 is (by the depression of the end (3 of the lever and the consequent influence of the spring 5 upon the lever) felt by the thread with the result that the latter is tensioned above the normal and in cases of slight raveling this increased tension is found to be effective toward the thread clearing itself. When such automatic clearing does take place, the lever 1 (under the action of the spring 5) rises and thereby restores the normal driving relation between the disk (I and wheel 0 so that winding again proceeds.

The catch 13 may be actuated for locking the lever by a spring if desired.

In the embodiment illustrated. the disk (Z is loosely arranged on the spindle a so that it may rise to stop the spindle without lifting the latter. In the form shown in Figs. 1, 2 and 3 the disk is arranged in the manner described in the specification of British Patent No. 8649 of 1913. This arrangement comprises a coil spring 11 one end of which is attached to the disk (Z and the other to a collar 0 adjustably fastened on the spindle c. The spring n allows the disk to be raised from the Wheel 0 without lifting the spindle e and the drive is transmitted from the disk to the spindle through the spring.

Another manner of arranging for the rise of the disk (Z on the spindle c-is shown in Fig. 5. In this form the part 7) of a dog clutch is fastened to the spindle the other part 9 of the clutch being on the disk. When the disk (Z is raised, the part Q slides on the part 1), the clutch serving to transmit rotation from the disk to the spindle.

It is preferable that thestop motion mechanism herein described should be employed in conjunction with a disk which is loosely arranged in either manner ust described as such mechanism is thereby rendered very sensitive in action. The stop motion may however be used with the ordinary form of spindle and disk where the latter is fast with the spindle.

A separate stop motion is applied to each spindle of the machine and each operates independently of the others to control its corresponding spindle.

The invention is not to be restricted to the details of construction herein mentioned as such may be varied if necessary or desired, without departing from the scope of the invention as defined by the appended claims.

\Vhat I claim then is 1. In a machine for winding yarns, threads and the like, the combination with a winding spindle, a disk thereon, and a friction wheel for driving said disk, of a stop motion mechanism comprising a lever, a guide at one end thereof to carry the winding thread, the opposite end being adapted to engage the winding spindle disk, means to yieldingly support said lever against the pull of the thread, said lever when actuated in opposition to said means by abnormal tensioning of the winding thread varying the contact between the disk and the friction wheel, and means operating automatically when the lever is moved by the thread to stopping position to hold said lever in said position thereby relieving the thread of this function, substantially as and for the purpose described.

2. In a machine for winding yarns, threads and the like, the combination with a winding spindle, a disk thereon, and a friction wheel for driving said disk, of a stop motion mechanism comprising a lever, a guide at one end thereof to carry the winding thread, the opposite end being adapted to engage the winding spindle disk, means to yieldingly support said lever against the pull of the thread, said lever when actuated in opposition to said means by abnormal tensioning of the winding thread varying the contact between the disk and the friction wheel, and a pivoted weighted locking catch adapted to automatically engage the lever when the latter is moved by the thread to the stopping position said catch holding the lever in said position thereby relieving the thread of this function, substantially as and for the pur pose described.

3. In a machine for winding yarns, threads and the like, the combination with a winding spindle, a disk thereon, and a friction wheel for driving said disk, of a stop motion thread, and a guide adjustably mounted in the thread oarryingend of the lever to carry as described.

the Winding thread, said guide being adjustable to vary the amount of spare thread and 15 the amount of movement permitted the lever in moving to, stopping position, substantially In testimony whereof I have signed my 7 name to this specification in the presence of 20 two: subscribing Witnesses.

HANS MARIA AUGUST CARL W ILDT.

Witnesses:

N. W. C. TAYLOR, GEORGE LESTER.

a Copies of this patent may be obtained for five cents each; by addressing the Commissioner of Patents,

Washington D. 0. 

